Heap Leaching Studies on Uranium Ores.

Laboratory amenability studies as well as a pilot heap-leaching investigation of low-grade sandstone uranium ores from Wyoming, new Mexico, and Colorado are described. Sulfuric acid heap leaching with oxidation, for 120 days, extracted up to 98 percent, 90 percent, and 79 percent u3o8 from Wyoming, New Mexico, and Colorado ores, respectively.